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Notes |
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Notes |
Most of the maps and data files in the Current Deployments section are now generated automatically every 3 hours. Use the Reload or Refresh button to ensure that you are seeing the latest data and not a cached copy.
Each deployment's page contains a textual listing of the most recent data received. The first section shows a summary of uplinks received from each SRDL. The second section shows a similar summary of locations, followed by the actual positions received in the last few days. The QUIET column shows the number of days between the latest uplink and the time that the page was created. Values of more than about 1 day are cause for concern.
Some of the transmissions made by SRDL's include diagnostic data. This page lists any diagnostics received in the last five days. The fields shown are:
Day/Time The time that the data was transmitted according to
the receiving satellite's atomic clock Tag time The time that the data was transmitted according to
the SRDL's clock Maxd The maximum depth recorded since the start of the
deployment (metres) Elapsed The number of days since the start of the deployment
(this field is not part of the transmission) Tx_num The number of completed transmissions. Wraps at 65536. Ab_tx The number of aborted transmissions (those cancelled
because the SRDL detected the submergence of the antenna before the
transmission was completed) Wet_Dry If the wet-dry sensor reads continuously wet or dry for an extended period,
the software concludes that it has failed. It then tries to use the depth sensor to determine when
the antenna is at the surface. This value shows how many times this has happened Latest reset The time of the latest hardware reset. The SRDL
is normally reset manually using the magnet switch, so this time should refer
to the last time the SRDL was activated prior to deployment. The SRDL also
contains an internal watchdog timer which can automatically restart the program if
it fails during the deployment Nrst The number of hardware resets since the SRDL was
constructed. An increase in this value after deployment indicates that a
recoverable program failure has occurred ADC The most recent reading of the pressure sensor during a dry state
(i.e. the surface offset). Used to check for transducer drift Odo The number of times the odometer appears to have stopped for more than 1 hour Wet_cond A running average of the impedance measured by the wet-dry
sensor when
nominally "wet" (should be close to 0) Dry_cond A running average of the impedance measured by the wet-dry
sensor when
nominally "dry" (should be close to 200)
In each section, there are two maps showing the movements of
all animals that have generated a location in the last few days. One map shows the
entire track of each animal since the beginning of the deployment, the other shows only the
most recent locations for each animal.
There are also similar maps for each animal separately. All the maps are provided in high
quality (about 70kB) and low quality (about 20kB). The content is the same, the only
difference is the amount of image compression.
Because they are generated automatically, the maps may sometimes have a peculiar spatial extent to accommodate very recent 'outlier' positions which have yet to be rejected by the filtering algorithm.
